Renesas R5F12048ANA#20

Overview

R5F12048ANA#20 from Renesas Electronics is an 8 KB flash, 1 KB RAM RL78/G15 16-pin microcontroller in HWQFN-16 (3 × 3 mm, 0.5 mm pitch) package, operating from 2.4–5.5 V with −40°C to +125°C industrial temperature rating (M-grade). It integrates an 8/10-bit 7-channel ADC, dual comparators, 8-channel 16-bit timer array, UART, two simplified SPI (CSI), two simplified I²C, and on-chip debug - targeting compact industrial control nodes, sensor interfaces, and battery-powered HMI modules.

For engineers reviewing the R5F12048ANA#20 datasheet, R5F12048ANA#20 pinout, R5F12048ANA#20 application, or R5F12048ANA#20 equivalent, key selection criteria include its M-grade thermal robustness, HWQFN-16 footprint compatibility, 8 KB code flash with 1 KB data flash (1M rewrite cycles), and support for both high-speed on-chip oscillator (±1.0% @ −20°C to +85°C) and external crystal (1–12 MHz).

Technical Context

The R5F12048ANA#20 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, enabling minimum instruction execution time of 0.0625 μs at 16 MHz. Its memory map spans 1 MB address space with four banks of 8-bit general-purpose registers, supporting efficient context switching in real-time interrupt-driven applications.

Power management includes HALT and STOP low-power modes, selectable power-on-reset (SPOR) with four voltage thresholds, and dedicated low-speed on-chip oscillator (15 kHz) for watchdog operation. Peripheral I/O redirection via PIOR registers enables flexible pin function assignment without hardware changes.

Key Specifications

Pinout & Package

Package: HWQFN-16 (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad - requires soldering to unconnected PCB copper area per Renesas recommendation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with R5F12048ANA#20, R5F12047ANA#20 reduces flash capacity by 50% but maintains identical I/O and timing performance, while R5F12048GNA#20 trades 20°C thermal headroom for potential cost savings - making the M-grade part essential for high-temperature deployment where long-term reliability is non-negotiable.

Availability

R5F12048ANA#20 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, automotive body electronics, and industrial HMI panels requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F12048ANA#20 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The RL78/G15 product line delivers ultra-low-power, cost-optimized 16-bit MCUs for resource-constrained embedded systems - designed specifically for industrial sensing, motor control, and human-machine interface applications requiring high reliability and extended temperature operation.

FAQ

What is the maximum operating frequency and accuracy of the high-speed on-chip oscillator in R5F12048ANA#20?

The R5F12048ANA#20 high-speed on-chip oscillator operates from 1 MHz to 16 MHz. Its frequency accuracy is ±1.0% over TA = −20°C to +85°C, ±1.5% over TA = −40°C to −20°C or +85°C to +125°C, and ±1.5% over TA = +85°C to +125°C. This specification applies specifically to the M-grade R5F12048ANA#20 device and is confirmed in the R01DS0420EJ0140 datasheet Rev.1.40.

Does R5F12048ANA#20 support background data flash rewriting while executing code from main flash?

No, R5F12048ANA#20 does not support background operation (BGO) for data flash rewriting. During data flash write/erase operations, instruction execution from code flash memory is halted. This behavior is explicitly documented in the datasheet: "Background operation (BGO) is not supported (instructions cannot be executed from the code flash memory while rewriting the data flash memory)."

How many analog input channels and comparators are available on R5F12048ANA#20?

The R5F12048ANA#20 provides 7 analog input channels (ANI0 to ANI6) and 2 independent comparators (COMP0 and COMP1), each with selectable internal (0.815 V) or external reference voltage. This configuration is confirmed for the 16-pin HWQFN variant in Table 1-4 and Section 1.6 of the R01DS0420EJ0140 datasheet.

What is the package type and thermal pad requirement for R5F12048ANA#20?

R5F12048ANA#20 uses the HWQFN-16 package (3 mm × 3 mm, 0.5 mm pitch) with an exposed die pad. Per Renesas documentation (Remark 3, Page 9), this pad must be soldered to a plated PCB area with no electrical connections - serving solely as a thermal path, not a ground or power node.

Can R5F12048ANA#20 operate with an external crystal oscillator, and what is the supported frequency range?

Yes, R5F12048ANA#20 supports external crystal oscillation via X1/X2 pins at frequencies from 1 MHz to 12 MHz. This is specified in Section 2.2.1 (X1 oscillator characteristics) and confirmed in the "Main system clock" row of Table 1-6 (Outline of Functions) in the R01DS0420EJ0140 datasheet.